Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [choice]

This is for questions about discrete choice modeling

0
votes
0answers
14 views

Copula-based joint models with the same covariates for the marginals?

I'm estimating a copula-based joint multinomial logit - linear regression model. The utility structure of the multinomial logit model is represented by $u_{ij}*=\beta_j'x_{ij}+\epsilon_{ij}$. In the ...
0
votes
0answers
8 views

Ordered logit with different choice sets at different times

I have the following dataset: at time $t_1$, a person faces the following ordered choice set $y \in [0,1]$, and at time $t_2$, he faces the ordered choice set $y \in [0,1,2]$. Assume the utility is $...
1
vote
1answer
34 views

Conditional logit or multinomial logit?

I have the following problem I need to use a discrete choice model to determine the time values (VOT) of 3 transport alternatives (car, bus and train). Looking at the literature of the discrete choice ...
0
votes
0answers
12 views

estimation conditional logit

I'm creating a code to estimate a conditional logit model. Comparing with the code that I adjust with the package "mlogit" I get very different coefficients, could you help me determine where I'm ...
2
votes
1answer
41 views

Logistic regression when the number of options differs by group?

I have data from a laboratory experiment in which I look at the effect of expanding the choice set on a particular option being chosen. The idea is that introducing an Option "B" reduces demand for an ...
0
votes
0answers
5 views

Choice modelling with context

We are trying to model itinerary choice for an airline. Given the attributes of a number of itineraries, we try to say the probability of booking for each one. Context matters here because the ...
1
vote
0answers
31 views

Experimental design for discrete choice response

I'm designing a survey where people need to choose one of three transportation alternatives. Here are the alternatives, their specific factors/attributes and the levels I intend to use for each: <...
2
votes
0answers
14 views

How to treat different status quo groups in a choice experiment?

I have a choice experiment where respondents choose between a status quo and one alternative. Before the choice questions, respondents are allocated to four different groups which determine the levels ...
0
votes
2answers
43 views

What is the appropriate test for a choice experiment where multiple subjects perform the experiment multiple times?

I'm testing multiple subjects in a choice task where they are either right or wrong. By chance they would choose the right answer 50% of the time. Each of my 11 subjects performs the test 24 times. To ...
3
votes
1answer
62 views

Probability of choosing the degenerate branch in a nested multinomial logit

This may be an obvious question, but I'm flummoxed. Let's say I've got a nested logit model with a degenerate nest—say, a healthcare choice model where the branches are Home vs. Hospital. The Home ...
0
votes
0answers
12 views

Comparing model fit with different number of choice occasions

I have estimated 2 models, one where each choice is modeled separately, while the other considers panel effects, thus reducing the number of choice occasions. Can I still use BIC to compare the two ...
0
votes
0answers
11 views

What is the probability of selecting a route among several routes given selection probability between any two routes?

Suppose there are $n$ feasible routes between a specific origin and destination for selection. Decision is made only based on route's trip time. Namely, the faster the route is the more probable it ...
0
votes
0answers
61 views

Choice design acc. to d-efficiency (Ngene): more than one block per respondent?

I have a question with regard to choice design for discrete choice experiments. Quite some time ago I conducted a choice experiment and now I am trying to publish a paper on that study. I got some ...
0
votes
0answers
32 views

Discrete choice model with exclusionary choices

Suppose we have many agents $j\in \{1,..,J\}$ choosing over options $i$ to maximize their outcome of the form $$ max_i ~~Y_{ij} = \beta x_i + u_{ij} $$ where $u_{ij}$ is an error term. The options, ...
0
votes
0answers
30 views

Recovering latent value from choice probabilities.

Suppose that people, indexed by $j$, must choose between options $i$ according to $$ max_i ~~(a_i +\epsilon_{ij})$$ Where $\epsilon_{ij}$ is an Extreme value Type I random variable (error term), ...
1
vote
0answers
47 views

Discrete choice model with autoregressive error term

I consider consumer choice over time $t$ over a set of alternatives $J$, whereby a consumer's perceived utility of option $j$ is $u_{jt}=x_{j}+\mu_{jt}$ with $\mu_{j0}=\epsilon_{j0}\sim\mathcal{F}(\...
1
vote
0answers
154 views

MLE for the conditional logit model seems to have awful precision?

I'm simulating the data underlying a conditional logit model then doing my own MLE estimation using optim. However, even with an unreasonably large amount of data, ...
0
votes
1answer
211 views

Rstats: From Discrete choice to Conjoint utilities

I'm having trouble figuring out how to correctly calculate Conjoint Part-worth-utility from a Discrete choice experiment. I have recently run a Pilot study to analyse in R where I used the packages “...
1
vote
1answer
27 views

Is this a nested logit when my regression equations are similar to that of a multinomial regression?

Let the mode of transport be a categorical random variable with three categories, representing Car, Bus and ...
0
votes
1answer
50 views

Multiple Choice Test: Probability of Identical Incorrect Answers

Setup: We consider a multiple choice test with 30 questions, each consisting of four potential answers. We know that (on average) neighbors answer 50% of all questions jointly correct. Assumption: ...
-1
votes
0answers
28 views

other than best fit choice criteria for non linear and linear models

I have run non linear and linear regression on my data comprising 4 predictor variables and therefore I have linear and non linear equation predicting my response variable Y. Both equations have ...
5
votes
1answer
175 views

BIC vs. intuition

This may be an obvious question: what do you do when the AIC or BIC choose a model that makes no sense in reality. I'm looking at data for predictors of hospital selection, and things like a spouse's ...
0
votes
0answers
52 views

relative frequency

I have a number of data such as the following. Each represents a trial where two options (V1 and V2) were given to a participant ("judge") and they were asked to pick one over the other. V1 and V2 can ...
1
vote
1answer
144 views

Estimation of Demand and Substitution in Case of Multinomial Logit Model

In MNL model, given the different alternative choices, we estimate the probability of choice across different options. E.g. using the fishing data, we can use the following calculations to estimate ...
1
vote
0answers
28 views

Is it mathematically possible to do a discrete choice experiment with uneven choice sets?

Hard to express what I'm trying to ask in a short title. I have a dataset in which respondents are asked to choose a hospital at which to deliver their baby. However...some respondents get to choose ...
0
votes
1answer
35 views

Probability of pipetting X number of cells in a solution

I had a biology friend ask me this question: Suppose I had 50 ml of solution in which exactly five red blood cells that are individually suspended (i.e., not sticking to each other). If I collect 2 ...
1
vote
0answers
66 views

Modeling votes on discrete outcomes with mlogit

I am looking to figure out do phone calls effect votes for a product in a product trial and I am wondering what the correct model design is. I have a toy dataset below that describes my problem. <...
0
votes
0answers
39 views

Proper family choice of GLM [duplicate]

I am debating this with some friends at the moment and would like to know what the stack exchange community can add to this discussion. When selecting the choice of the distribution and link function,...
0
votes
2answers
95 views

What is the choice of statistical test when the dependent variable is binary but independent variable is multinomial

What is the choice of statistical test if you have a binary dependent variable but a multinomial independent variable? Example will be Outcome - Good skin vs Bad skin Skin Care product - A vs B vs C ...
2
votes
1answer
201 views

Non-categorical choice: multinomial logit or something different?

My case is quite simple. Customers are faced with series of choices of unique alternatives. For example: Customer 1 chooses one of 1,2,3,4,5,6 Customer 1 chooses one of 7,8,9 Customer 2 chooses one ...
0
votes
1answer
36 views

Balls in a bucket

I have 4,000 empty buckets and I randomly put one ball in 200 buckets, so there are 200 buckets with balls, and 3,800 without. I then randomly pick one bucket. The chances of picking a bucket with a ...
1
vote
0answers
139 views

Discrete Choice Modeling from Aggregate Data

I am working on a problem where customers make choices. A traditional setting for problem for example would be: Model the Travel by air, bus, car. Each choice is made based on several variables ...
1
vote
1answer
20 views

Classification with varying choice set (e.g. Auction)

I have the following situation: I am a customer and I search for a commodity to buy. I receive several offers from various companies and I must make a choice which one to buy. After some time I make ...
1
vote
0answers
245 views

Conditional Logit in a Panel Data setting with varying alternatives over waves

I am working on a panel data setting and this data is on cigarette smoking behavior of individuals. I am specifically focusing on two variables - the brand name of the cigarette that the individual ...
1
vote
1answer
49 views

How to interpret estimation (regression, discrete choice ) result?

In a discrete choice model setting, lets say my model function is $U(x)= \beta_0+\beta_1X_1+\beta_2X_2+\beta_3X_3+\beta_4X4+\epsilon$ with independent variable $X_1$ has a value ranges from -2.5 ...
1
vote
1answer
39 views

Statistical method to find the effect of attributes on customer's choice?

At every trial a person chooses one of several options (the number of options varies from trial to trial). Every option has several numerical attributes. Attributes are the same for every option but ...
2
votes
1answer
154 views

How to do multinomial regression when baseline choice percentage of one choice item is 0%

I am trying to find a clever way to analyze the choice ratios between a baseline condition and a different condition. Specifically, I have a baseline condition, where the choice ratio between two ...
1
vote
0answers
82 views

Choice probabilities with Frechet distributions that have different minimums

For two independent Frechet distributed variables that have the same shape parameter but different scale parameters: $$ F_i(x) = e^{-\psi_i x^{-\epsilon}}, i=1,2$$ The probability of one variable ...
1
vote
3answers
111 views

Assessing predictive validity of choice models

I am trying to assess predictive validity of a discrete choice model. When with a testing set consisting of 6 choices in each set, it has the hit ratio of 33% (i.e., 33% of the time it correctly ...
2
votes
0answers
196 views

How to predict the probability of a discrete choice problem?

I am looking for a discrete choice model (e.g. a logit) to describe the reaction of a pedestrian when a car is arriving. Depending on the severity of the conflict and other geometrical parameters, he ...
2
votes
1answer
637 views

D-efficiency in choice-based conjoint analysis

How to calculate the D-efficiency of experimental designs in conjoint analysis? Specifically, how do you specify the $X$ and the number of $nBetas$ in this formula: $$ D_e=\frac{|X'X|^{1/nBetas}}{...
1
vote
0answers
78 views

Utility partworths from dicrete choice experiments

Is it possible to estimate utility partworths from a discrete choice experiment (DCE)? For example, if you construct a DCE using the R package support.CEs and ...
0
votes
0answers
103 views

Why would parameters not be statistically significant in a discrete choice model?

Is there a method to identify why a parameter is not statistically significant at the 5% level in a discrete choice model (also called a conditional logit model)? For those unfamiliar with discrete ...
2
votes
2answers
204 views

Reasonable approach for modelling churn (survival) and choice of intervention campaign (multinomial regression)?

I've only recently moved into customer analytics, and would love to get some advice around designing a reasonable approach to modelling my data. I want to be able to predict customer churn (that is, ...
2
votes
0answers
531 views

BIBD or IBD or PBIBD

I use block design for discrete choice experiment. While Balanced incomplete block design(BIBD) is considered as gold standard for blocking in choice experiments. However this is not always possible ...
-1
votes
1answer
291 views

Do probabilities need to sum to 1 in a choice model? [closed]

We're create a discrete choice model, in which there are more than two alternative choices. There are some options for this, such as the multinomial logit and the conditional logit.. We started with ...
2
votes
0answers
102 views

How to analyze ranks as responses?

A client has data where multiple subjects (people) have been presented with with four product alternatives, and after experiencing all four, were asked to rank the products. The data look like this:...
4
votes
2answers
2k views

How do I do a conjoint analysis in R? I don't think the conjoint package is appropriate

We have conducted a conjoint survey of people's preferences when shopping for salmon. We have defined our salmon products in terms of "price" (20p steps from £3.60 to £5), "eco-certification" (none, ...
2
votes
0answers
50 views

Probability: Unlimited Amount

I made a program to guess on a multiple choice test with an unlimited amount of questions. I want to know the chances of getting 5 questions correct in a row. There are 4 choices on each question. ...
1
vote
1answer
542 views

CBC analysis using choicemodelr - interpretation of the output attribute values

I finished a choice-based conjoint (CBC) survey. Now i am evaluating my results with the R-Package "ChoiceModelR". With this i get Beta Values, with which i can, for example, compute attribute ...